1) For given parameter for creating swirl, the Eliminator is consisted of a tapered-tube that is designed such that a chamber of circular cross-section becomes smaller, then connected with a cylindrical straight tube chamber. Fluid with bubbles flows tangentially into the tapered tube from an inlet port and generates a swirling flow that circulates the fluid through the flow passage.?

2) The swirling flow accelerates downstream, and the fluid pressure along the central axis decreases downstream. From the end of the tapered-tube, the swirl flow decelerates downstream and the pressure recovers toward the outlet.

3) There are certain position-dependent centrifugal forces created in all parts of the swirl flow, and the bubbles tend to move toward the central axis of the Eliminator due to the difference in centrifugal force. Small bubbles are trapped which makes an air column in the vicinity of central axis of the swirling flow near the area where the pressure is the lowest.

4) When back pressure is applied at the downstream side of the Eliminator, the collected bubbles will be ejected through the vent port.